| Patents for H02M 5 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases (13,094) |
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| 09/19/1989 | EP0314669A4 Switched capacitor induction motor drive. |
| 09/13/1989 | CN1035593A Power control circuit with phase controlled signal input |
| 09/12/1989 | US4866585 AC to DC solid state power supply using high frequency pulsed power switching |
| 09/06/1989 | CN2044106U Power saving switch for protection of electric appliance |
| 09/05/1989 | US4864487 Control for three terminal power semiconductor devices |
| 09/05/1989 | US4864483 Static power conversion method and apparatus having essentially zero switching losses and clamped voltage levels |
| 08/23/1989 | CN2043414U Following type a.c power source automatic voltage regulator |
| 08/22/1989 | US4860186 PWM controller having synchronous and asynchronous mode |
| 08/22/1989 | US4859924 Inverter |
| 08/15/1989 | US4858100 Electric power converter |
| 08/10/1989 | WO1989007364A1 Speed controller |
| 08/09/1989 | EP0113744B1 Power graduation system with monoline distribution of the controls and energy |
| 08/08/1989 | US4855652 Speed control apparatus for a brushless direct current motor |
| 08/02/1989 | EP0326332A2 Method of operating AC drive with parallel connected DC link power converters |
| 08/02/1989 | CN2042257U Silicon-controlled zero-triggered power regulator |
| 08/02/1989 | CN2042256U Safe ac convertor |
| 08/01/1989 | US4853664 Three-phase transformer for cycloconverter |
| 08/01/1989 | US4853608 AC voltage regulator |
| 07/26/1989 | EP0325301A2 Power control apparatus |
| 07/26/1989 | EP0325136A1 Discharge circuit for the battery of the intermediate circuit of a converter with an intermediate circuit |
| 07/20/1989 | DE3836128A1 Brightness control circuit for incandescent lamps and switched-mode power supplies |
| 07/19/1989 | EP0324401A2 Electrical switch device |
| 07/19/1989 | CN2041466U Music integrated circuit block multipurpose controller for household electric appliances |
| 07/19/1989 | CN2041464U Ac current transducer |
| 07/18/1989 | US4849870 Method of operating a-c drive with parallel connected d-c link power converters |
| 07/11/1989 | US4847745 Three phase inverter power supply with balancing transformer |
| 07/11/1989 | US4847744 Voltage converter apparatus |
| 07/11/1989 | CA1257327A1 Apparatus for operating cycloconverters in parallel fashion |
| 07/11/1989 | CA1257326A1 Control method for cycloconverter and control apparatus therefor |
| 07/06/1989 | DE3738507C1 High-voltage transformer for transformation of a low electrical voltage into a higher output voltage, using a piezoelectric element |
| 07/05/1989 | EP0322689A2 Electrical apparatus |
| 06/28/1989 | CN2040281U Power-saving voltage regulator for electric appliance |
| 06/28/1989 | CN1004675B Device for stabilizing torsional-vibration of turbogenerator shaft |
| 06/27/1989 | US4843366 Controller for use with dimmer module |
| 06/27/1989 | US4843296 AC motor drive apparatus |
| 06/27/1989 | US4843202 Magnetron with frequency control for power regulation |
| 06/22/1989 | DE3905701A1 Method of regulating a four-quadrant invertor in one-phase bridge circuit arrangement |
| 06/21/1989 | CN2039886U Ac bridge anti-jamming power supply |
| 06/21/1989 | CN1004597B Arrangement for transferring electric power |
| 06/20/1989 | US4841426 Method for controlling the semiconductor switches of a rectifier bridge connected to an a.c. mains supply, and a control unit designed for applying the method |
| 06/14/1989 | CN2039477U 电压适配器 Voltage adapters |
| 06/13/1989 | US4839566 Circuit for supplying power to a dental photopolymerizing apparatus |
| 06/06/1989 | CA1255363A1 Fail-safe pulse coincidence detector |
| 06/01/1989 | WO1989005056A1 Control circuit for triacs |
| 05/31/1989 | CN2038698U Single wire bridge type light-regulating switch |
| 05/24/1989 | CN2038306U Antijamming and centralized silicon controlled light adjuster |
| 05/24/1989 | CN1033134A Pwm controller |
| 05/24/1989 | CN1033133A Single-phase frequency conversion circuit |
| 05/24/1989 | CN1033132A Arangement for high frequency link power conversion |
| 05/23/1989 | US4833588 Direct AC/AC converter system |
| 05/23/1989 | US4833586 PWM control for power converter system utilizing pulse dropping at minimum pulse widths |
| 05/23/1989 | US4833584 Quasi-resonant current mode static power conversion method and apparatus |
| 05/23/1989 | US4833583 Electric supply device for an ozonizer |
| 05/23/1989 | US4833389 Current source inverter control system for load commutated induction motor drive |
| 05/23/1989 | US4833339 Load control system |
| 05/17/1989 | EP0316006A2 PWM controller |
| 05/17/1989 | EP0315871A1 Process and device for the control of a current rectifier in an asymmetric network |
| 05/17/1989 | CN2037893U Voltage converting device |
| 05/17/1989 | CN2037865U Program-controlled energy-saving switch |
| 05/10/1989 | EP0314872A2 Digital gate pulse generator for cycloconverter control |
| 05/10/1989 | EP0314669A1 Switched capacitor induction motor drive. |
| 05/09/1989 | US4829416 Apparatus for controlling power transducers of the pulse width modulation (PWM) control type |
| 05/05/1989 | WO1989004084A1 Quasi-resonant current mode static power conversion method and apparatus |
| 05/03/1989 | CN2037120U Contactless voltage regulator |
| 04/26/1989 | EP0313366A2 Variable speed constant frequency power system with boost converter auxiliary output |
| 04/26/1989 | CN1032607A "comparison-tracking-amplifying" type of freq converter |
| 04/19/1989 | EP0311995A2 Power saving circuitry |
| 04/18/1989 | US4823251 Controller for instantaneous output current and/or voltage of 3-phase converter |
| 04/18/1989 | US4823247 Stabilized power supply unit |
| 04/18/1989 | US4823069 Light dimmer for distributed use employing inductorless controlled transition phase control power stage |
| 04/18/1989 | US4823068 Cross tie for induction motor drive |
| 04/11/1989 | CA1252511A1 Ac voltage stabilizer easily convertible into uninterruptible power supply (ups) |
| 04/05/1989 | CN2035546U Automatic balanced regulator for single phase furnace powered by three-phase power supply |
| 04/05/1989 | CN1032271A Ac voltage converter |
| 04/04/1989 | US4819148 Digital gate pulse generator for cycloconverter control |
| 04/04/1989 | US4818836 Power supply for a three-phase plasma heating unit |
| 03/28/1989 | US4816985 Apparatus for controlling an alternating current power supply |
| 03/28/1989 | US4816980 Converter system for coupling two high voltage three-phase networks |
| 03/23/1989 | DE3825990C1 Voltage-supply circuit arrangement for control devices of semiconductor switches which can be turned off via their control terminal |
| 03/22/1989 | EP0307719A2 Power source apparatus |
| 03/21/1989 | US4814967 Digitally-controlled cycloconverter |
| 03/15/1989 | EP0306686A2 Parallel resonant circuit invertor with security circuit |
| 03/15/1989 | CN2034347U Multipurpose electronic controller |
| 03/08/1989 | CN2033650U Pottery inner pot and electricity saving device to be used with ordinary electric rice cooker |
| 03/07/1989 | US4811193 Variable frequency controller |
| 02/28/1989 | US4808842 Dual voltage generator system |
| 02/16/1989 | DE3804807C1 Electronic voltage transformer |
| 02/15/1989 | CN2032777U Voltage generator for three-phase sine-wave |
| 02/14/1989 | US4805082 Regenerative two-quadrant converter |
| 02/14/1989 | US4804923 Voltage control system |
| 02/09/1989 | DE3735199A1 Electrical switching arrangement, especially a mains voltage stabiliser |
| 02/09/1989 | DE3725923A1 Converter system having an intermediate-circuit DC voltage which is obtained by means of a rectifier |
| 02/07/1989 | US4803611 Apparatus for correcting DC component of output voltage in inverter |
| 02/07/1989 | US4803586 Voltage control module |
| 02/01/1989 | CN2031976U Variable-frequency and variable-voltage power supply generation device |
| 02/01/1989 | CN2031975U Three-phase zero-crossing-triggering thyristor power regulator |
| 02/01/1989 | CN2031974U Low-voltage remote-control voltage regulator |
| 01/24/1989 | US4800481 Static converter circuit and method for controlling it |
| 01/18/1989 | EP0299275A1 Power converter assembly for coupling two kinds of high-voltage three-phase networks together |
| 01/18/1989 | CN1030504A Constant power method for graphitization power supply device |